* public class CustomPackagingProvider implements PackagingProvider {
 *     public Collection<Packaging> provides() {
 *         return Arrays.asList(
 *             packaging("docker-image"),
 *             packaging("flatpak")
 *         );
 *     }
 * }
 * </pre>
 *
 * @see org.apache.maven.api.Packaging
 * @see org.apache.maven.api.spi.ExtensibleEnumProvider
 * @since 4.0.0
 */
@Experimental
@Consumer
@Named

        }

        // second step get parameter names of all plugin goals
        Set<String> parametersNamesAll = mojoDescriptor.getPluginDescriptor().getMojos().stream()
                .flatMap(m -> m.getParameters().stream())
                .flatMap(this::getParameterNames)
                .collect(Collectors.toSet());

        unknownParameters = getUnknownParameters(mojoExecution, parametersNamesAll);

        .expect("A", "B", "C", "D", "E");
  }

  public void testFlatMap() {
    SpliteratorTester.of(
            () ->
                CollectSpliterators.flatMap(
                    Arrays.spliterator(new String[] {"abc", "", "de", "f", "g", ""}),
                    (String str) -> charactersOf(str).spliterator(),

    }

    @Override
    @Nonnull
    public List<Profile> getEffectiveProfiles() {
        return Stream.iterate(this.project, Objects::nonNull, MavenProject::getParent)
                .flatMap(project -> project.getModel().getDelegate().getProfiles().stream())
                .toList();
    }

    @Override
    @Nonnull
    public List<Profile> getDeclaredActiveProfiles() {

@NullUnmarked
public class ImmutableBiMapFloodingTest extends AbstractHashFloodingTest<BiMap<Object, Object>> {
  public ImmutableBiMapFloodingTest() {
    super(
        EnumSet.allOf(ConstructionPathway.class).stream()
            .flatMap(
                path ->
                    Stream.<Construction<BiMap<Object, Object>>>of(
                        keys ->
                            path.create(transform(keys, key -> immutableEntry(key, new Object()))),

     *
     * @return a stream containing this node and its descendants
     */
    @Nonnull
    default Stream<Node> stream() {
        return Stream.concat(Stream.of(this), getChildren().stream().flatMap(Node::stream));
    }

      "$prefix/samples/guide/src/main/java/okhttp3/recipes",
      "$prefix/samples/guide/src/main/java/okhttp3/recipes/kt",
    ).map { File(it) }

  return directories.flatMap {
    it
      .listFiles()
      .orEmpty()
      .filter { f -> f.isFile }
      .toList()
  }
}

internal class MainTestProvider : SimpleProvider() {
  override fun arguments(): List<Any> {

                    }

                    @Override
                    public Stream<Phase> allPhases() {
                        return Stream.concat(Stream.of(this), phases().stream().flatMap(Phase::allPhases));
                    }
                })
                .collect(Collectors.toList());
    }

    @Override
    public Collection<Alias> aliases() {
        return Collections.emptyList();

        String id = id(requireNonNull(artifact, "artifact cannot be null"));
        if (session.getMavenSession().getAllProjects() != null) {
            session.getMavenSession().getAllProjects().stream()
                    .flatMap(this::getProjectArtifacts)
                    .filter(a -> Objects.equals(id, id(a)))
                    .forEach(a -> a.setFile(path != null ? path.toFile() : null));
        }
        if (path == null) {

    public Type require(String id) {
        requireNonNull(id, "id cannot be null");
        return usedTypes.computeIfAbsent(id, i -> {
            Type type = lookup.lookupList(TypeProvider.class).stream()
                    .flatMap(p -> p.provides().stream())
                    .filter(t -> Objects.equals(id, t.id()))
                    .findFirst()
                    .orElse(null);
            if (type == null) {